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Change Windows line endings to Unix version

https://www.howtogeek.com/771399/how-to-use-the-find-command-in-linux/
This is sample output - yours may be different.
0

find . -type f -regex '.*\.$cpp\|h$' -exec egrep -l $'\r'\$ {} \; | xargs dos2unix

swarzynski · 2022-08-02 09:28:38 1121
rsync over ssh
This is sample output - yours may be different.
0

rsync -avz -e ssh username@hostname:/path/to/remote/dir/ /path/to/local/dir/

int9h · 2009-02-18 22:02:38 5
Creating sequence of number with text

Nice command to create a list, you can create too with for command, but this is so faster. Show Sample Output
This is sample output - yours may be different.
```
jeju:[xxxx] > seq 10 |xargs -n1 echo Printing line
Printing line 1
Printing line 2
Printing line 3
Printing line 4
Printing line 5
Printing line 6
Printing line 7
Printing line 8
Printing line 9
Printing line 10
jeju:[xxxx] >
```
0

seq 10 |xargs -n1 echo Printing line

Waldirio · 2009-10-15 11:05:35 7
Start the x11vnc server

This will start the x11vnc server, scale it at 6/7, will use the vncpass file to authenticate and wont shut down as soon as a client disconnects
This is sample output - yours may be different.
0

x11vnc -display :0 -scale 6/7 -rfbauth vncpass -forever

JulijanAndjelic · 2009-11-12 21:32:45 3
Send a local file via email

on this way we can define the body too
This is sample output - yours may be different.
0

{ echo -e "$body"; uuencode "$outfile" "$outfile"; } | mail -s "$subject" "$destaddr" ;

glaudiston · 2009-12-10 18:08:59 4
Create a series of incrementing numbers in vim

given lines of the form 123|XXXX|1000 ... 123|XXXX|1011 each 'XXXX' will be replaced with a serial number between 0001 and 0004. Show Sample Output
This is sample output - yours may be different.
```
123|XXXX|1000
123|XXXX|1001
123|XXXX|1010
123|XXXX|1011
---
123|0001|1000
123|0002|1001
123|0003|1010
123|0004|1011
```
0

:.,$!perl -pne 'for $i ("0001".."0004"){ s/XXXX/$i/ if($i == $.) }'

bartonski · 2010-02-11 03:56:26 8
Query well known ports list

Just use your system preinstalled file Show Sample Output
This is sample output - yours may be different.
```
[root#server][~]> portnum 25
smtp            25/tcp          mail
smtp            25/udp          mail
```
0

portnum() { egrep "[[:space:]]$*/" /etc/services; }

unixmonkey26187 · 2011-10-07 16:38:29 3
change file permissions whithout changing directory permissions recursive
This is sample output - yours may be different.
0

sudo find foldername -type f -exec chmod 644 {} ";"

megger · 2012-03-20 21:25:10 3
Displays all available firmware you can get (non-free) in a Debian system
This is sample output - yours may be different.
0

apt-file --package-only search /lib/firmware

gnugr · 2012-09-04 15:14:46 6
Useless fun

Something I pulled off 4chan, it plays a tune.
This is sample output - yours may be different.
0

echo "main(i){for(i=0;;i++)putchar(((i*(i>>8|i>>9)&46&i >>8))^(i&i>>13|i>>6));}" | gcc -x c - && ./a.out | aplay

r0nd0n · 2013-01-09 21:48:23 6
get gzipped logs from webserver to local machine
This is sample output - yours may be different.
0

ssh user@remote "tar cfp - /path/to/log/* | gzip" > local.tar.gz

vaaclav · 2013-04-30 09:18:18 6
Poor man's

I sometimes have use an usb stick to distribute files to several standalone "internet" pc's. I don't trust these machines period. The sticks I have do not have a write protection. So as a added security measure I fill the unused space on the (small) usb stick with a file with randomly generated bits. Any malware that tries to write to this stick will find no space on it. Tested on slackware 14 Note: you may need root access to write to the device. This depends on your mount options. Show Sample Output
This is sample output - yours may be different.
```
set +e +u; dd if=/dev/urandom of="/media/usb1/$$";sync;sync
dd: writing to ?/mnt/hd/2967?: No space left on device
32617+0 records in
32616+0 records out
16699392 bytes (17 MB) copied, 1.436 s, 11.6 MB/s
```
0

set +e +u; dd if=/dev/urandom of="/media/usb1/$$";sync;sync

warkruid · 2013-12-22 14:35:53 21
Serve current directory tree at http://$HOSTNAME:8000/
This is sample output - yours may be different.
0

ruby -run -e httpd . -p 8000

koter · 2014-03-19 16:34:06 8
Grab all JIRA ticket numbers (e.g. ABC-123) mentioned in commits added in feature branch off of master

To get the list of tickets in a comma-separated list, pipe the above into: sort | uniq | perl -pe 's/\n/, /' | sed 's/, $//' Show Sample Output
This is sample output - yours may be different.
```
ABC-123
ABC-124
ABC-145
```
0

git log master...feature-a | grep -o -E '\b([A-Z]+)-[0-9]+\b' | sort | uniq

westonruter · 2014-07-07 18:51:01 6
optimize all png images
This is sample output - yours may be different.
0

find . -name *.png | xargs optipng -nc -nb -o7 -full

homoludens · 2014-10-29 10:17:31 9
Get non-localhost IPs from all Internet interfaces
This is sample output - yours may be different.
0

ifconfig -a | grep inet | awk '{print $2}' | cut -d ":" -f 2 | grep -v 127.0.0.1

Dairenn · 2015-02-09 19:19:20 8
Create a new File without I/O

Create a new file, without checking the existence, without I/O; environment test: Linux Bash
This is sample output - yours may be different.
0

>> "file_name";

Izhaq_Melo · 2015-06-03 03:03:57 9
Unzip all zip files in a directory into a newly created directory based on zip file name

For some reason some people do not place files into folders before archiving. This fixes the mess by creating new directories per zip file in directory to unzip to. Show Sample Output
This is sample output - yours may be different.
```
Archive: ABC.zip
extracting: ABC/1
extracting: ABC/2
Archive: DEF.zip
extracting: DEF/1
extracting: DEF/2
```
0

for f in *.zip; do unzip -d "${f%*.zip}" "$f"; done

osu · 2017-07-26 22:26:22 16
Visual system load display

It takes the first value of /prov/loadavg to print that many stars followed by the value. Show Sample Output
This is sample output - yours may be different.
```
******************** 20.98
********************* 21.30
******************* 19.92
**************** 16.85
*************** 15.50
************** 14.90
```
0

while [ true ]; do cat /proc/loadavg | perl -ne 'm/(^[^ ]+)/; $L = $1; print "*" x $L; print " $L\n";' ; sleep 6; done

t3o · 2017-10-13 06:47:06 22
search into contents of python module

srchpymod for e.g. srchpymod cairo Surface ['ImageSurface', 'PDFSurface', 'PSSurface', 'SVGSurface', 'Surface', 'SurfacePattern', 'XlibSurface'] Show Sample Output
This is sample output - yours may be different.
```
Matched symbols in the python module.
```
0

srchpymod() { python -c "import $1; print filter(lambda x: x.find('$2') >= 0, dir($1))"; };

jyro · 2009-02-16 02:47:13 60
Eclipse needs to know the path to the local maven repository. Therefore the classpath variable M2_REPO has to be set.

Taken from - http://maven.apache.org/guides/mini/guide-ide-eclipse.html
This is sample output - yours may be different.
0

mvn -Declipse.workspace=<path-to-eclipse-workspace> eclipse:add-maven-repo

savaged · 2009-05-22 10:12:29 3

Geo Weather

This command will determine an individuals local weather, based on their I.P. address. I had to learn a lot about SED and a little about XMLStarlet in order to achieve this. This command is my original work and there is much room for improvement; I look forward to any constructive feedback. Show Sample Output

xmlstarlet fo "http://www.google.com/ig/api?weather=$(curl -s api.hostip.info/get_html.php?ip=$(curl -s icanhazip.com)... SEE SAMPLE OUTPUT

o0110o · 2010-02-11 06:32:44 5

display the ttl of a hostname in a human readable form

This function uses timetrans from the dnssec-tools to calculate the remaining time until a dns entry reaches its time to live and is fetched from the authoritive nameserver again. Show Sample Output
This is sample output - yours may be different.
```
$ ttl www.commandlinefu.com
17 minutes, 7 seconds
```
0

function ttl { /usr/sbin/timetrans -count $(dig +noquestion +noadditional +noauthority $1 | grep "^$1" | awk '{print $2}') }

cz8s · 2010-11-22 17:46:03 4
Dump /dev/ttyS0 on background automatically from startup

Put this command on /etc/rc.local.
This is sample output - yours may be different.
0

nohup cat /dev/ttyS0 | tee -a llamadas.db&

fjrojast · 2011-05-05 15:47:27 3
Displays all installed firmware in your Debian sytem
This is sample output - yours may be different.
0

aptitude search ~i ~nfirmware

gnugr · 2012-09-04 15:21:47 4
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list files recursively by size

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

resolve hostname to IP our vice versa with less output

inverted version: resolveip -s 216.34.181.xxx freshmeat.net

List the CPU model name

Information for only one core.

Find last reboot time

Displays time of last system boot

rename files according to date created

The command renames all files in a certain directory. Renaming them to their date of creation using EXIF. If you're working with JPG that contains EXIF data (ie. from digital camera), then you can use following to get the creation date instead of stat. * Since not every file has exif data, we want to check that dst is valid before doing the rest of commands. * The output from exif has a space, which is a PITA for filenames. Use sed to replace with '-'. * Note that I use 'echo' before the mv to test out my scripts. When you're confident that it's doing the right thing, then you can remove the 'echo'... you don't want to end up like the guy that got all the files blown away. Credits: http://stackoverflow.com/questions/4710753/rename-files-according-to-date-created

Check if the LHC has destroyed the world

This says if the LHC has destroyed the world. Run it in a loop to monitor the state of Earth. Might not work reliable, if the world has actually been destroyed.

Count lines of code across multiple file types, sorted by least amount of code to greatest

The same as the other two alternatives, but now less forking! Instead of using '\;' to mark the end of an -exec command in GNU find, you can simply use '+' and it'll run the command only once with all the files as arguments. This has two benefits over the xargs version: it's easier to read and spaces in the filesnames work automatically (no -print0). [Oh, and there's one less fork, if you care about such things. But, then again, one is equal to zero for sufficiently large values of zero.]

Find out how old a web page is

I used to use the Firefox "View page info" feature a lot to determine how stale the web page I was looking at was. Now that I use mostly Chrome I miss that feature, so here is a command line alternative using wget. The -S says to display the server response, the --spider says to not download any files/pages, just fetch the header. The output goes to stderr, so to grep it you use 2>&1 to combine the stderr stream with stdout, the pipe that to grep for Last-Modified. You can use curl instead if you have it installed, like this: $ curl --head -s http://osswin.sourceforge.net | grep Mod

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